I've come to the conclusion that the single worst mechanic in Warlords is the one where you fly to an area and then grind things until a blue bar is full. It's a terrible, terrible mechanic, and it is all over Warlords.
I hated this mechanic when it appeared in Guild Wars 2, and I hate it in WoW.
It's kind of interesting, because it's not that different from getting three daily quests to do in a specific area, at least in overall execution. But I think what makes it different is that the blue bar is just indiscriminate. You do everything you can as fast as you can.
Whereas the daily quests at least have specific targets. Part of doing dailies is a mini-optimization game where you learn how to complete the specific requirements in a minimum amount of time. As well, the daily quests can have a bit of story added in, and require specific targets like a boss.
Basically, for me, a structure like:
- Do 3 of Item A and 3 of Item B and 3 of Item C
just feels better and is more interesting in actual play than:
- Do 9 of [Item A or Item B or Item C]
Filling several smaller bars is better than filling one big bar. I strongly hope that Legion drops these blue bar areas and goes back to having different daily quests.